Dr. Dong-Jin Yoon Profile

Dr. Dong-Jin Yoon

Director, Principal Research Scientist at Korea Research Institute of Standards and Science

SPIE Involvement:

Conference Program Committee | Author

Proceedings Article | 17 June 2009 Paper

Structural damage identification based on laser ultrasonic propagation imaging technology

Chen-Ciang Chia, Si-Gwang Jang, Jung-Ryul Lee, Dong-Jin Yoon

Proceedings Volume 7389, 73891S (2009) https://doi.org/10.1117/12.827241

KEYWORDS: Sensors, Ultrasonics, Ferroelectric materials, Inspection, Transducers, Wave propagation, Pulsed laser operation, Ultrasonography, Mirrors, Receivers

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Proceedings Article | 8 April 2009 Paper

Sensitivity enhancement of fiber optic FBG sensor for acoustic emission

Dae-Cheol Seo, Dong-Jin Yoon, Il-Bum Kwon, Seung-Suk Lee

Proceedings Volume 7294, 729415 (2009) https://doi.org/10.1117/12.821516

KEYWORDS: Sensors, Fiber optics sensors, Fiber Bragg gratings, Fiber optics, Ferroelectric materials, Acoustic emission, Lead, Acoustics, Fiber optics tests, Denoising

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Proceedings Article | 16 May 2008 Paper

Fiber optic acoustic sensors for crack growth diagnostics

Dae-Cheol Seo, Il-Bum Kwon, Chi-Yeop Kim, Dong-Jin Yoon

Proceedings Volume 7004, 70044T (2008) https://doi.org/10.1117/12.786140

KEYWORDS: Sensors, Fiber Bragg gratings, Fiber optics sensors, Acoustics, Light sources, Semiconductor lasers, Fiber optics, Diagnostics, Aluminum, Signal detection

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Proceedings Article | 22 April 2008 Paper

Smart acoustic emission system for wireless monitoring of concrete structures

Dong-Jin Yoon, Young-Gil Kim, Chi-Yeop Kim, Dae-Cheol Seo

Proceedings Volume 6932, 69323A (2008) https://doi.org/10.1117/12.777545

KEYWORDS: Sensors, Acoustic emission, Nondestructive evaluation, Algorithm development, Safety, Bridges, Signal processing, Metrology, Defect detection, Signal generators

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Acoustic emission (AE) has emerged as a powerful nondestructive tool to detect preexisting defects or to characterize failure mechanisms. Recently, this technique or this kind of principle, that is an in-situ monitoring of inside damages of materials or structures, becomes increasingly popular for monitoring the integrity of large structures. Concrete is one of the most widely used materials for constructing civil structures. In the nondestructive evaluation point of view, a lot of AE signals are generated in concrete structures under loading whether the crack development is active or not. Also, it was required to find a symptom of damage propagation before catastrophic failure through a continuous monitoring. Therefore we have done a practical study in this work to fabricate compact wireless AE sensor and to develop diagnosis system. First, this study aims to identify the differences of AE event patterns caused by both real damage sources and the other normal sources. Secondly, it was focused to develop acoustic emission diagnosis system for assessing the deterioration of concrete structures such as a bridge, dame, building slab, tunnel etc. Thirdly, the wireless acoustic emission system was developed for the application of monitoring concrete structures. From the previous laboratory study such as AE event patterns analysis under various loading conditions, we confirmed that AE analysis provided a promising approach for estimating the condition of damage and distress in concrete structures. In this work, the algorithm for determining the damage status of concrete structures was developed and typical criteria for decision making was also suggested. For the future application of wireless monitoring, a low energy consumable, compact, and robust wireless acoustic emission sensor module was developed and applied to the concrete beam for performance test. Finally, based on the self-developed diagnosis algorithm and compact wireless AE sensor, new AE system for practical AE diagnosis was demonstrated for assessing the conditions of damage and distress in concrete structures.

Proceedings Article | 15 April 2008 Paper

Two step signal processing of optical fiber mesh for intruder detection

Il-Bum Kwon, Dae-Cheol Seo, Chi-Yeop Kim, Dong-Jin Yoon

Proceedings Volume 6945, 69451P (2008) https://doi.org/10.1117/12.779688

KEYWORDS: Optical fibers, Signal processing, Fiber optics sensors, Speckle pattern, Fiber optics, Signal detection, Sensors, Data acquisition, Magnetic sensors, Infrared sensors

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Proceedings Article | 18 September 2007 Paper

Self-sensing of CNF and Ni nanowire/PVDF and cellulose composites using electro-micromechanical test

Joung-Man Park, Pyung-Gee Kim, Jung-Hoon Jang, Sung-Ju Kim, Dong-Jin Yoon, George Hansen, K. Lawrence DeVries

Proceedings Volume 6645, 66451D (2007) https://doi.org/10.1117/12.731389

KEYWORDS: Nickel, Composites, Actuators, Ferroelectric polymers, Carbon, Nanofibers, Nanocomposites, Resistance, Humidity, Nanowires

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Proceedings Article | 19 January 2007 Paper

Self-sensing and actuation of CNF and Ni nanowire/polymer composites using electro-micromechanical test

Joung-Man Park, Sung-Ju Kim, Pyung-Gee Kim, Dong-Jin Yoon, George Hansen, K. Lawrence DeVries

Proceedings Volume 6463, 64630B (2007) https://doi.org/10.1117/12.703384

KEYWORDS: Nickel, Composites, Actuators, Carbon, Magnetism, Epoxies, Copper, Metals, Polymers, Nanowires

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Proceedings Article | 11 April 2006 Paper

Nondestructive sensing and stress-transferring evaluation of carbon nanotube, nanofiber, and Ni nanowire strands/polymer composites using an electro-micromechanical technique

Joung-Man Park, Sung-Ju Kim, Jin-Gyu Jung, George Hansen, Dong-Jin Yoon

Proceedings Volume 6174, 61742U (2006) https://doi.org/10.1117/12.652736

KEYWORDS: Composites, Nickel, Nanofibers, Ferroelectric polymers, Humidity, Resistance, Epoxies, Carbon, Nondestructive evaluation, Nanowires

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Proceedings Article | 28 February 2005 Paper

Ultrasonic standing wave generator for a smart particle separating device

Dong-Jin Yoon, Young-Sup Lee, Jaehwa Kwon

Proceedings Volume 5649, (2005) https://doi.org/10.1117/12.582506

KEYWORDS: Particles, Ultrasonics, Ferroelectric materials, Clouds, Modeling, Transducers, Acoustics, Measurement devices, Optical amplifiers, Zoom lenses

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Proceedings Article | 18 June 2002 Paper

Assessment of the integrity of concrete bridge structures by acoustic emission technique

Dong-Jin Yoon, Philip Park, Juong-Chae Jung, Seung-Seok Lee

Proceedings Volume 4704, (2002) https://doi.org/10.1117/12.470726

KEYWORDS: Bridges, Sensors, Acoustic emission, Corrosion, Nondestructive evaluation, Picture Archiving and Communication System, Inspection, Analytical research, General packet radio service, Acoustics

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Proceedings Article | 9 June 2000 Paper

AE characteristic for monitoring of fatigue crack in steel bridge members

Dong-Jin Yoon, Juong-Chae Jung, Philip Park, Seung-Seok Lee

Proceedings Volume 3995, (2000) https://doi.org/10.1117/12.387856

KEYWORDS: Bridges, Acoustic emission, Wave propagation, Sensors, Interference (communication), Signal detection, Nondestructive evaluation, Signal generators, Electronic filtering, Ultrasonics

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Proceedings Article | 1 February 1999 Paper

Assessing corrosion damage in reinforced concrete beams using acoustic emission

Dong-Jin Yoon, W. Jason Weiss, David Prine, Surendra Shah

Proceedings Volume 3587, (1999) https://doi.org/10.1117/12.339931

KEYWORDS: Corrosion, Sensors, Acoustic emission, Failure analysis, Cements, Nondestructive evaluation, Transducers, Computing systems, Interfaces, Wave propagation

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Showing 5 of 12 publications

Conference Committee Involvement (10)

NDE 4.0, Predictive Maintenance, Communication, and Energy Systems: The Digital Transformation of NDE II

25 March 2024 | Long Beach, California, United States

NDE 4.0, Predictive Maintenance, Communication, and Energy Systems: The Digital Transformation of NDE

14 March 2023 | Long Beach, California, United States

NDE 4.0, Predictive Maintenance, and Communication and Energy Systems in a Globally Networked World

8 March 2022 | Long Beach, California, United States

NDE 4.0 and Smart Structures for Industry, Smart Cities, Communication, and Energy

8 March 2021 | Online Only, California, United States

Smart Structures and NDE for Industry 4.0, Smart Cities, and Energy Systems

27 April 2020 | Online Only, California, United States

Showing 5 of 10 Conference Committees

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